Passive Fan-Out

Passive Fanout Pix

The  simple resistive passive fan-out provides adequate permformance, fidelity, and signal margin when distributing GPS clock signals to multiple DSB (DOR Service Board) cards.   

Passive Fan-out Sketch  -- a manufacturing drawing.
Passive Fan-out Schematic -- a manufacturing drawing

GPS Clock to DOM Hub Fan-Out in the Temporary Counting House 2005 -- This is the important page describing, in a general way, how timing distribution cabling is implemented.

During installation of the passive fan-out,  the 32ns 10 MHz cables from the passive fan-out panel to the DOM Hubs were assigned randomly.
The phase of the 10 MHz  signals, as measured at the test-points on JP4 of the DSB card, matched to within 350 ps.